IS : 5115 - 1969 Indian Standard ( Reaffirmed 2002 ) SPECIFICATION FOR DOMESTIC STORAGE TYPE WATER HEATERS FOR USE WITH LPG ( First Reprint FEBRUARY 1990 ) UDC 683.97:662.767 @I Copyright 1969 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 Gr3 December 1969 lS:5115-1969 Indian Standard SPECIFICATION FOR DOMESTJC STORAGE TYPE WATER HEATERS FOR USE WITH LPG hmestic (Pressure and Commercial Sectional Gas Burllirl~ Committee, :Ippliances CPDC 23 Type) Refwe.wnfing The Indian Oil Corporation Ltd, Bombay SHlll s. P. M.\~rll"ic ( Allernafc to Shl i S. P. Adarkar ) Indian Institute of Petroleum, Debra I)un SHRI P. N. BHA,MBI SHRI P. K. Gost ( Al~crna~e ) The Central Furl Research Institute, P.O. FRI, SHRI S. K. DAB GUPTA Distt Dhanbad The Mans-field Gil Gas Co Ltd, Calcutta SHRI K.K. GANEKIWALA SHRI B. N. PAUI, ( A~ternafr ) National Test House, Calcutta SHR~ A. GHOSH National Steel Equipment Co, Bombay SHRI K. D. HATHIRAM The Burmah-Shell Oil Storage and Distributing Co SHI~I K. D. KAP~OH of India Ltd, Bombay SIIRI E. FIZRNAN~EZ( Alternate ) M. Gunvantrai, Bombay SHXI GUNVANTHAI B. MEHTA Sum M. FRANCIS ( Alternate ) The Federation of Hotel and Restaurant Auociation SHRI M. NIRULA of India! New Delhi Panchal Engmeering Works, Ahmedabad SHRI BABUBHAI G. PANCHAL SHRI P. M. RAJ~URU ( Alternate ) Bombay Foods Private Ltd, Bombay SHRI VAZIR~INQH N. SINQH SHRI L. K. THAKKAR ( Alternate ) The Esso Standard Eastern Inc. Bombav SHRI V. N. SUQANDHI Oriental Metal Pressing Works'Pvt Ltd; Bombay SHRI G. D. TRAKOOR SHRI .J. E. YORKE ( Alternate ) Director General, ISI ( Ex-oficio Member) SHRI A. B. RAO, Director ( Consr Prod ) Secdary SHIU J. C. GERA Assistant Director (Consr Prod), IS1 BUREAU MANAK OF BHAVAN, INDIAN 9 BAHADUR STANDARDS SHAH ZAFAR 110002 MARG NEW DELHI Is:5115-1969 Indian Standard SPECIFICATION FOR DOMESTIC STORAGE TYPE WATER HEATERS FOR USE WITH LPG 0. FOREWORD 0.1 This Indian Standard CVBS adopted by the Indian Standirds Institution on 24 April 1969, aftrr the draft finalized I)y the Domestic and Commercial Gas 13urning Appliances (Pressure Type ) Sectional Committee had been approved by the Consumrr Products Division Council. 0.2 1s: 51 IG-1!6!Y' to which refcxrtnce has bcrn made in this standard with rtkgard to grncral rtarluircmcnts as well as method3 of tests, is a necessary adjunct to this standard. Should, however, anv deviation exist between the requirements of the former and those of tdis standard, provisions of the latter shall apply. 0.3 Compliance with this standard does not of itself guarantee that Conditions of use vary greatly and it satisfactory service will be attained. is necessary to relate the standards OF performance to the actual use to which the appliance will be subjected during its life. 0.4 In preparing this standard, assistance has been derived from B.S. 2883 : 1964 `Specification for domestic instantaneous and storage water with liquefied petroleum gases' issued by the British heaters for use Standards Institution. 0.5 Attention is invited to A-l (c) which calls for an agreement betiveen the purchaser and the supplier or which permits the purchaser to use his option for selection to suit his requirements. 0.6 For the purpose of deciding whether a particular standard is complied with, the final value, observed or ing the result of a test or analysis, shall be rounded off The number of significant plicesretained IS : 2-19607. value should be the same as that of the specified value --_ *General requirements for domestic and commercial equipment tRules for rounding off numerical values ( revised ). requirement of this calculated, expressin accordance with in the rounded off in this standard. for lue with LPG. 2 15:5115-1969 1. SCOPE 1.1 This standard specifies the constructional and performance requirements of domestic storage type water heaters for use with liquefied petroleum gases at a working pressure of 30 gf/cm2, designed to provide a ready supply of hot water at a maximum water temperature of 85"C, having nominal capacities between 6 and 100 litres. 2. TERMINOLOGY 2.0 For the purpose of this standard the following definitions, to the definitions given in 2 of IS : 5116-1969* shall apply. 2.1 Storage Type Water Heater-A in addition in which a volume of water is heated under thermostatic when required. self-contained control and stored for use appliance 3. MATERIALS 3.0 In addition to the relevant material requirements specified in Section 1 of IS : 5116-1969*, the requirements given in 3.1 to 3.4 shall apply. 3.1 Apparatus plates and all bosses for screwed connection shall be made of gunmetal or brass of brazing quality. All pipes for water and gas shall be of copper, brass or other suitable material not inferior to copper or brass in resistance to corrosion under normal working conditions. 322 Outer casing of the water heater shall be constructed from corrosion resisting material or shall be adequately protected from corrosion on all surfaces. 3.3 The material used for lagging the water does not corrode the container or other parts not crumble, sag, or deteriorate in use to such is impaired. It shall be immune to attack by IS: 5116-1969*. 4. CONSTRUCTION heater shall be such that it in contact with it and does an extent that its efficiency vermin and moisture. in 4.6 of 3.4 The gas cocks and taps shall be made of a material prescribed 4.0 In addition to the relevant constructional requirements Section 1 of IS : 5116-1969*, the requirements given in 4.1 apply. 4.1 The material used for the container shall be of adequate provide sufficient mechanical regidity and adequate strength the pressure test as given in Appendi A. i- specified in to 4.17 shall thickness to to withstand +&neral requirementsfor domestic and commercial equipmentfor use with LPG. 3 1s : 5115 - 1969 4.2 All seams, joints, bosses for screwed connections and flanges of Tf permanent nature shall be secured by welding or brazing or soldering. soft solder I tin-lead alloy) is used for ,jointing, the solder shall not be depended upon for mechanical strength and this shall be assured by spot welding, dovetailing, riveting or other similar methods. 4.3 The lagging material if provided shall be packed and supported in a manner which precludes the possibility of large air pockets developing within it. 4.4 Fixing -There the water heaters pipes. 4.4.1 shall be adeqllste provision for fixing and supporting so that no stress is transmitted to water pipes or gas may he arranged for floor or wall mounting. 1\`ater heaters 4.5 Facility of Maintenance-Similar parts of water heaters of the same The parts which make, model and size shall be readily interchangeable. may require maintenance or replacement shall, as far as practicable, be so located as to assure easy access and replacement. 4.5.1 Each gas jet or burner complete with jet shall be reaclily accessible for replacement and shall hear a characteristic jet or burner identification mark. 4.5.2 It shall be possihle to remove the burner without breaking th+hinlet and outlet water connections or the flue gas connection of the appliance or .draining the tank. 4.5.3 To remove the water and gas sections the use of screw drivers adjustahle spanners only shall be required. and 4.5.4 The component parts and particularly heat exchanger shall be (Vessels whose interiors are inaccessieasily-accessible and easy to clean. ble shall be accepted if fitted with a suitahle drain plug easily recognisable and accessible. ) 4.6 Gas inlet connections shall conform below and 17 of TS:5116-1969*. 4.6.1 The follows: gas inlet connections to the requirements appliance given in 4.6.1 for different ratings shall be as Maximum Rating of Appliance Up to and including 10 080 kcal,/h Over 10 080 kcal/h and including 25 200 kcal/h Over 25 200 kcal/h and commercial Minimum Bore mm 6 9 13 equipment ' l Cen~l requirements for domatic for use with LPG. 4 IS I 505 - mm 4.7 Water Connections-Whenever the water connections to the water haters including valves, taps, pipes and pipe fittings are threaded, the SC~`~W threads shall comply with IS : 554-l 964*. The diameter of water &nections for inlet and outlet used on water heaters shall be as follows (see also IS : 404-1962t and IS : 1239-1964: ): Cu@ci~ 1 61 15 1 32: 50 1 1:: 1 Minimum Size mm 15 J 30 4.7.1 It shall be possible to descale all water ways susceptible to the formation of scale. 4.8 Gas and Water Taps-The water heaters shall be provided with such gas and water taps as are essential for normal operation of the appliance by the user. This requirement does not include water taps for control at outlets remote from the appliance. If taper-plug type water taps are used as a part of the water heater, they should comply with the require; ments of taper plug gas cocks. 4.8.1 Gus Taps -These shall conform to 7.1 and 7.12 of IS : 5116-1969& These taps shall' be accessible to the user, to enable the gas supply to the pilot and main burner to be turned on and off. On heaters with an input exceeding 10 080 kcal/h either a pilot gas tap which interlocks with the main gas tap, or a P-stage gas tap with a `pilot' position, should be \ provided. 4.9 Gas Rate Adjusters-Where provided, gas rate adjusters shall be set and sealed by the manufacturer and shall not be liable to accidental alteration. 4.10 Primary Air Regulator-Any aerationadjustershall notbe capable of closing the air inlet completely and shall not he liable to accidental alteration. 4.11 Jet Fixing - It shall not be possible to loosen completely burner jets or injector jets without the use of tools. `Dimensions for pipe threads for gas list tubes and pressure tight screwed fittings ( rcu&d .tSperification for lead pipes ( revised ). $Specificarion for mild steel tubes and tubulars ( revised). $Gcneral requirements for domestic and commercial equipment for use with LPG. ). 5 _ 1$x5115-1969 4.12 mot Burnera -A exceeds 1 500 kcal/h. 4.12.1 Pilots IS:5116-1969*. 4.12.2 shall lighting conform pilot shall be provided to the requirements if the heat input given in 12 of Pilot burners must be so fitted that they can be easily removed. 4.13 Flame Failure Device-Every appliance shall be incorporated with, a flame failure device and shall satisfy the requirements specified in 13 of IS:5116-1969*. 4.14 Flue Outlet-The appliance shall have provision for connection to a flue outlet unless'the heat input does not exceed 1 500 kcallh or the storage capacity does not exceed 25 litres. 4.14.1 All appliances of capacity over 14 litres of water or gas consumption of over 250 g/h, shall be fitted with a connection to a vent pipe for the combustion gases. 4.14.2 Draught Diverter-Every flue shall incorporate a draught water diverter. heater requiring ccmnection to a 4.15 Gas Pressure TappingA gas pressure tapping shall be fitted after the automatic gas valve. The pressure required at the point shall .be durably marked in g/cm2 near the tapping. 4.16 Filter - A suitable filter shall be provided thermostatic valve and the pilot gas tapping. 4.17 Water in the gas way before the phere must Regulator-Appliances with water surf&zes open to atmosbe provided with a device intended for regulating the rate of flow of the water. REQUIREMENTS requirements specified in Section given in 5.1 to 5.6 shall apply. 2 of 5. PERFORMANCE 5.0 In addition IS : !j 116-1969*, to the relevant the requirements 5.1 Combustion-When sampled as detailed in 5.1.1, the carbon monoxide/ carbon dioxide .ratio of the products of combustion shall not exceed 0.02 at any rate between the minimum operational rate and an overload rate of 12.5 percent above the manufacturer's normal rate. Test shall be made at a sufficient number of heat input rates to determine the combustion performance over the whole of the prescribed range. 5.1.1 All appliances shall be fed with cold water so as to maintain a temperature rise of 16 f 5'c at normal heat input, and sampling shall be carried out when thermal equilibrium has been established. M'herever *General requirements for domestic and commercial equipment for use with LPG. 6 IS : 5115.1969 practicable teristics: a) b) c) d) a sampling hood shall be used having the following charac- It shall collect all the products from the appliance, Products shall not spill from the periphery of the hood, There shall not be undue dilution of products lvith excess air, and The hood shall not interfere with the combustion of gas in the water heater. A hood suitable for most purposes is shown in Fig. 1. FVhere the hood would interfere with test conditions, the products of combustion shall be This may be done by collected from a convenient part of the flue duct. means of a L shaped probe inserted into the duct and arranged so that the open end can scan the duct cross-section while sample is withdrawn. When the infra-red gas analyzer is used, complete mixing may be ensured by passing the sample to a 1-litre flask; alternatively the products may be drawn from the probe into an aspirator. REOULAlOR FRICTION WITH SPRING . SAMPLING TUBE, ' FIG. 1 5.2 Draw-off Water HOOD YOK WATER HEATERS -- \Vhrn tested according 7 to method Temperature IS;SllS-1969 given in Appendix B, draw-off water temperature requirements given in 5.2.1 and 5.2.2. 5.2.1 The maximum water temperature mostat setting shall he as follows: shall be according at the highest conditions and to the therunless at obtainable a) It should not exceed 70°C under equilibrium water is required for special purposes; and b) It shall not exceed 9O'C, if successive frequent intervals. small quantities are drawn 5.2.2 The outlet water temperature obtained after drawing-off quantity of water equal to half the total capacity of the water heater shall be within 8°C of the highest tempt?rature,obtained. 5.3 Antidrip DeviceThe storage water heaters with open delivery shall be provided with antidrip device. The quantity of water required to cause water to flow through the outlet shall between 2.5 and 4 percent inclusive of water capacity of the container when tested in accordance with the method described in Appendix C. The device shall he so designed that a continuous flow from the outlet of the heater is obtained with not more than 50 percent of the manufacturer's normal flow rating, and that the flow of water is interrupted cleanly. 5.4 Loss by Evaporation -The evaporation loss from an appliance with inlet water control shall not exceed 5 percent of the total contents, when gas rate. operated for 12 h ours at maintenance 5.5 Water Temperature in Feed Cisterns -The temperature rise of the water in an integral ball-valve-feed cistern after heating the appliance up when cold and operating it at maintenance gas rate for 4 hours shall not exceed 15°C at an initial water temperature and ambient air temperature of 27 jz 2°C. 5.6 Thermal Efficiency-TThe thermal efficiency when described in Appendix D shall be not less than 70 percent. 6. INSTRUCTIONS 6.0 In addition to the requirements specified in 23 of IS: 5116-1969*, requirements specified in 6.1 to 6.4 below shall apply. the tested as 6.1 F2'ater heater shall be supplied with clear instructions supplemented, if necessary, with diagrams or illustrations indicating the method of installation and cnnnection and precautions necessary to provide for the expansion of water duririg heating and relief of partial vaccum, if likely to occur. Attention may also be drawn to the requirements of statutory authorities, *General requirements for domestic and commercial equipment for use with LPG. 8 IS:5115-1969 if any, such as water and gas snpply rules applicable to water heaters. Attention should be drawn for the need for periodical descaling of the inner container of the water heater depending "pon the hardness of water being used. 6.2 Instructions sheet shall contain ances in confined space, for example the warning against showc*r c~ll)iclcs. installing applion 6.3 Total weight of appliance \\hc,n Ml and \\arning walls or floors of insufficient strength. against mounting 6.4 Warning against connecting the appliance directly it is not designed to withstand an inlef water testpressure 7. MARKING to the mains if of 13 kgf/cm*. 7.1 In addition to the marking requirements specified in 24 of IS:51 1619f39*, the water heaters shall also be marked with the following: maximum working head of water (for controlled a) Permissible ontlct water heaters 11; b) Water capacity in litres; butane; c) Total heat input in kcaljh with commercial from 15°C with d) Recovt!ry time for water to reach 65% (average) ambient temperature of 15°C; and e) Hot and cold water connections identified. 8. PACKING 8.1 The requirements given in 25 of IS : 5116-1969* shall apply. shall he clearly and permanently APPENDIX ( Clausa 4.1 ) PRESSURE A CONTAINERS TEST FOR WATER HEATER A-1. The container of every water heater shall be subjected for a period of 5 minutes to a hydraulic or pneumatic test pressure as follows, and shall not show any leakage or appreciable permanent distortion. a) Heaters intended to withstand only the head of water they contain (for example, those with a broken feed) shall be sound when completely filled with water at maximum water temperature. *General requirements for domestic and commercial equipment for use with LPG. 9 ls:5115-1969 b) Other heaters intended for connection to a cistern supply shall not leak or show any sign of distortion at a water pressure 50 percent greater than the recommended maximum head. c) Other heaters with inlet water controls shall not leak or show any sign of distortion at a pressure to be agreed to between the manufacturer and the testing authority. d) Ilcaters intended to withstand mains water pressure shall not leak or shojv any sign of damage or distortion at a static water pressure of 20 kgf.`cm2. Nn1~~-Hearers dcsignrd to expose the water exempted fcorn the above test. surface open to atmosphere are APPENDIX ( CZause5.2 ) METHOD R-l. PROCEDURE FOR DETERMINATION TEMPERATURE B OF DRAW-OFF B-l.1 Light the gas and continue heating until three consecutive readings of the gas rate indicate that a minimum has been reached in the case of a gradual acting thermostat, or that the main gas supply has been closed in the case of a snap-acting thermostat. Turn out the gas, admit cold water at the manufacturer's rated flow, and plot a curve of outlet water temperature against volume of water delivered, taking temperature readings every few seconds. APPENDIX (Clause 5.3) METHOD C-l. PROCEDURE OF TEST FOR C DEVICE ANTIDRIP C-l.1 Fit a suitable water flow meter in the inlet water supply and note the minimum inlet water flow rate required to give a continuous delivery whilst the device is operating. Turn off the water control tap, and when flow through the outlet has ceased add water (for example, via funnel connected to a 2-way cock in the inlet supply) until water flows from the outlet. Determine the minimum quantity required to cause water to flow. 10 IS:5115-1969 APPENDIX (Clause 5.6) D OF METHOD FOR DETERMINATION THERMAL EFFICIENCY D-O. This test is to determine the proportion of the heat input to the burner that is recovered in the water when a known weight of water is heated, through an observed temperature range using Test Gas A or Test Gas B. D-l. PROCEDURE D-l.1 The appliance shall be filled with cold water at 20 f 5°C to its normal capacity less 1 litre for each 20 litres and fraction thereof. Weight The lid of the appliance shall be fitted with of the water shall be noted. an aluminium stirrer and a mercury-in-glass thermometer calibrated to 0.5% least count. D-1.2 To commence the test, initial temperature of water shall be recorded and the burner lighted; simultaneously the stop watch shall be started and meter reading noted. Thermometer shall be observed periodically and stirring commenced when the temperature reaches 80°C. When the temperStirring ature reaches 85"C, the gas shall be turned off and watch stopped. is continued until the maximum temperature is reachedon the thermometer. D-1.3 Cold water at a measured temperature and at a steady flow shall be ad,mitted at the top. The displaced water shall be drawn off through the shortest possible length of pipe at the bottom into weighed- bin (or sequence of bins ), the temperature being measured at the point of draw-off every few seconds and observations shall be continued until the temperature of wat .r A smooth being drawn off is within 1°C of the inlet water temperature. curve of temperaturdagainst time shall be plotted; the area A below the curve shall be computed, and from this area and the rate of flow of water, the total heat content of water shall be calculated. D-2. CALCULATIONS thermal efficiency percent of the = appliance shall be calculated as D-2.1 The follows: Thermal where efficiency, RxAxlOO CV x Q R = rate of flow of water in kg/min, A E area under time-temnerature curve in min "C, W = weight of the gas u&d in g, and net calorific value of the gas used in k&/g. Q= NOTE - In the above calculations, water equivalent of the appliance ir not taken into account. 11 BUREAU Headquarters: OF leDIAN STANDARDS Marg, NEW DELHI 110002 Telegrams: Manaksanstha ( Common to all Offices 1 Telephone 331 01 31 331 13 75 I 36 24 99 21843 I 3 16 41 . Manak Bhavan, 9 Bahadur Shah tafar Telephones: 331 01 31, 331 13 75 Regional Offices: Central Manak Bhavan. 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 : 1 /14 C. I. T. Scheme VII M. V. I. P. Road, *Eastern Maniktola, CALCUTTA 700054 Northern : SC0 445-446, Sector 35-C, CHANDIGARH 160036 Southern twestern : C. I. T. Campus, MADRAS 600113 : Manakalaya, E9 MIDC, Marol, Andheri BOMBAY 400093 4": `2: :f 1 41 2916 ( East ), 6 32 92 95 Branch Offices: `Pushpak'. Nurmohamed Shaikh Marg, Khanpur, 2 63 48 AHMADABAD 380001 2 63 49 I $.Peenya Industrial Area 1 st Stage, Bangalore Tumkur Road 38 49 55 BANGALORE 560058 38 49 56 1 Gangotri Complex, 5th Floor, Bhadbhada Road, T. T. Nagar, 66i 16 BHOPAL 462003 Plot No. 82/83. Lewis Road. BHUBANESHWAR 751002 5 36 27 531'5. Ward No. 29, R.G. Barua Road, 5th Byelane, 3 31 77 GUWAHATI 781003 5-8-56C L. N. Gupta Marg ( Nampally Station Road ), 23 1083 HYDERABAD 500001 63471 R14 Yudhister Marg. C Scheme, JAIPUR 302005 { 6 98 32 117/418 B Sarvodaya Nagar, KANPUR 208005 { t: :`: ;; Patliputra Industrial Estate, PATNA 800013 6 23 05 T.C. No. 14/l 421. Universitv P.O.. Palayam 16 21 04 TRIVANDRUM 695035 1621 17 inspection Offices ( With Sale Point ): Pushpanjali, First Floor, 205-A West High Court Road, 2 51 71 Shankar Nagar Square, NAGPUR 440010 Institution of Engineers ( India ) Building, 1332 Shivaji Nagar, 5 24 35 PUNE 411005 *Sales Office in Calcutta is at 5 Chowringhee Approach, P. 0. Prlncep 27 68 00 Street. Calcutta 700072 tSeles Office in Bombay ir et Novelty Chambers, Grent Road, 89 65 28 Bombay 400007 $Sales Office in Bangalore is at Unity Building, Narasimharaja Square, 22 36 71 Bangalore 560002 Reprography Unit, BIS, New Delhi, India _